package net_TCP.G;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.net.Socket;
import java.util.Scanner;

/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: qian
 * Date: 2023-02-18
 * Time: 18:11
 */
public class TcpEchoClient {
    private Socket socket = null;
    public TcpEchoClient(String serverIp , int port) throws IOException {
        //这个操作相当于让客户端和服务器建立tcp连接
        //这里的连接上了，服务器的accept 就会返回
        socket = new Socket(serverIp,port);
    }

    public void start(){
        Scanner scanner = new Scanner(System.in);
        try (InputStream inputStream = socket.getInputStream();
             OutputStream outputStream = socket.getOutputStream()) {

            while (true) {
                //1.从键盘上读取用户输入的内容
                System.out.print("->");
                String request = scanner.next();
                //2.把读取的内容构造成请求，发送给服务器
                //这里的发送是带有换行的
                PrintWriter printWriter = new PrintWriter(outputStream);
                printWriter.println(request);
                //手动刷新缓冲区
                printWriter.flush();
                //3.从服务器读取响应内容
                Scanner scannerFromSocket = new Scanner(inputStream);
                String response = scannerFromSocket.next();
                //4.把响应结果显示到控制台上
                System.out.println(response);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public static void main(String[] args) throws IOException {
        TcpEchoClient tcpEchoClient = new TcpEchoClient("127.0.0.1",9090);
        tcpEchoClient.start();
    }
}
